Swartchild Hole End Music Box Mainspring - 23/64" x .010 x 39½" Long - No. 77.123.1

Swartchild Music Box Mainspring, Hole End – 23/64″ Width, .010 Strength/Thickness, 39½″ Length, P/N 77.123.1, steel, new in package. See images for further details. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch & clock parts and all parts are unconditionally guaranteed. Images do a pretty good job of representing the item